Datasheet

11
LT1490A/LT1491A
sn1490, 14901afbs
–
+
V
OUT
1490A TA02
100k
100k
C
0.1µF
V
OUT
= 5V
P-P
WITH 5V SUPPLY
I
S
= 200µA
59k
1/2 LT1490A
5V
R
50k
f =
1
2RC
AT V
S
= 5V, R = 50k, C = 1nF
OUTPUT IS 5kHz SLEW LIMITED TRIANGLE WAVE
–
+
V
IN
1490A TA04
0.22µF
C
L
≤ 10,000pF
150Ω
1/2 LT1490A
Square Wave Oscillator
Optional Output Compensation for
Capacitive Loads Greater Than 200pF
Q10
D5
Q9
Q1
Q7
R2
1k
R3
1k
R4
40k
Q8
Q5
–IN
+IN
Q11 Q12
D4
ONE AMPLIFIER
D2
Q2
D1
Q6
Q13 Q14
R1
30k
R5
40k
Q4
2µA
+
Q15
Q19
D3
Q3
Q16 Q18
Q22
V
+
Q17 Q20
Q21
OUT
V
–
1490A SS
TYPICAL APPLICATIO S
U
SI PLIFIED SCHE ATIC
WW
APPLICATIO S I FOR ATIO
WUUU
Gain
The open-loop gain is almost independent of load when
the output is sourcing current. This optimizes performance
in single supply applications where the load is returned to
ground. The typical performance photo of Open-Loop
Gain for various loads shows the details.